[coreboot] kexec --reset-vga from an inteldrmfb frame buffer

[ron minnich]

I had a patch at some point for the kernel which boiled down to "it's
working! keep your hands off it!" and it's fairly simple. But it did
require a change.

On Tue, Jul 18, 2017 at 8:55 AM Trammell Hudson <hudson at trmm.net> wrote:

> When I have my coreboot payload Linux kernel setup a console framebuffer
> and then kexec into Xen + another kernel, the video glitches out quite
> a bit before falling back to text mode.  The kexec --reset-vga option
> doesn't seem to have any effect.
>
> I read in the docs that kexec and framebuffers don't get along and
> it seems that the patch from 2006 only works with VESA:
>
> https://lkml.org/lkml/2006/7/17/58
>
> My system is using i915 graphics, and there is no option ROM, so I don't
> think it even shows up with any VESA compatible modes.  Is there any
> way to reset the card or to transfer the mode info to the next kernel?
>
> --
> Trammell
>
> --
> coreboot mailing list: coreboot at coreboot.org
> https://mail.coreboot.org/mailman/listinfo/coreboot
>
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